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77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/* __sigset_t manipulators. Generic/BSD version.
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SIGSETOPS_H
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#define _SIGSETOPS_H 1
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#include <signal.h>
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/* Return a mask that includes SIG only. The cast to `sigset_t' avoids
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overflow if `sigset_t' is wider than `int'. */
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# define __sigmask(sig) (((__sigset_t) 1) << ((sig) - 1))
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#define __sigemptyset(set) \
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(__extension__ ({ \
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*(set) = (__sigset_t) 0; \
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0; \
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}))
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#define __sigfillset(set) \
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(__extension__ ({ \
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*(set) = ~(__sigset_t) 0; \
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0; \
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}))
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# define __sigisemptyset(set) \
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(*(set) == (__sigset_t) 0)
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# define __sigandset(dest, left, right) \
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(__extension__ ({ \
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*(dest) = *(left) & *(right); \
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0; \
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}))
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# define __sigorset(dest, left, right) \
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(__extension__ ({ \
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*(dest) = *(left) | *(right); \
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0; \
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}))
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/* These macros needn't check for a bogus signal number;
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checking is done in the non-__ versions. */
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# define __sigismember(set, sig) \
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(__extension__ ({ \
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__sigset_t __mask = __sigmask (sig); \
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*(set) & __mask ? 1 : 0; \
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}))
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# define __sigaddset(set, sig) \
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(__extension__ ({ \
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__sigset_t __mask = __sigmask (sig); \
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*(set) |= __mask; \
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0; \
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}))
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# define __sigdelset(set, sig) \
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(__extension__ ({ \
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__sigset_t __mask = __sigmask (sig); \
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*(set) &= ~__mask; \
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0; \
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}))
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#endif
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